Reusable electronic trailer seal

A reusable electronic seal for a trailer which comprises:

• a structural enclosure configured to attach onto a shackle of a padlock, wherein said structural enclosure further comprising an outwardly extending arm for interfacing with the padlock, and said structural outwardly extending arm further having a shackle aperture therethrough configured to receive a pivotal leg of the padlock shackle to lock the seal onto the padlock
• an electronic module integrated within the enclosure, said module comprising;
• a rechargeable battery producing an electrical power source,
• a battery charging circuit in communication with said battery,
• a photovoltaic cell in communication with said battery charging circuit providing a power source for recharging the battery,
• a voltage sensor interfacing with said battery indicating battery voltage,
• a microprocessor programmed with software to receive a battery voltage signal from the voltage sensor and if low voltage is sensed by the microprocessor the microprocessor sends a signal to the battery charging circuit to recharge the battery, wherein said microprocessor receiving electrical power from said battery,
• a random number generator interfacing with said microprocessor,
• a liquid crystal display communicating with said random number generator, and
• a shackle engagement switch configured to engage the padlock shackle, applying a signal to said microprocessor such that when the padlock has been opened and re-latched the shackle engagement switch signals the microprocessor to signal the random number generator to send a new number to the liquid crystal display.